bencomp: As I mentioned, they are mixed in with some other non-dv4 stuff, so I'll have to find some time to extract them. And I suspect that they will change (become more modular) as I get docker stuff going here.

pdurbin: implies that the client (in this case the browser) has passed on something like a checksum so that it can "confirmed to have been uploaded completely" - but maybe in the world of browser multi-part uploads that is simply the size?

pdurbin: for large-data transfers, i feel like the protocol handler should be responsible for this (rsync, sftp, globus, etc) and that after a successful transfer, the checksum should be stored in dataverse metadata